// Copyright 2017 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
author: Caitlin Potter <caitp@igalia.com>
esid: sec-generator-function-definitions
description: >
  `yield` is a valid statement within async generator function bodies.
flags: [async]
features: [async-iteration]
---*/

function Test() {
    var g1 = async function*() { yield; };
    var g2 = async function*() { yield 1; };

    var iter1 = g1();
    iter1.next().then(function(result) {
      assert.sameValue(
        result.value, undefined, "Without right-hand-side: first result `value`");
      assert.sameValue(
        result.done, false, "Without right-hand-side: first result `done` flag");
    }).then(undefined, $DONE);
    iter1.next().then(function(result) {
      assert.sameValue(
        result.value, undefined, "Without right-hand-side: second result `value`");
      assert.sameValue(
        result.done, true, "Without right-hand-side: second result `done` flag");
    }).then(undefined, $DONE);

    var iter2 = g2();
    iter2.next().then(function(result) {
      assert.sameValue(
        result.value, 1, "With right-hand-side: first result `value`");
      assert.sameValue(
        result.done, false, "With right-hand-side: first result `done` flag");
    }).then(undefined, $DONE);
    iter2.next().then(function(result) {
      assert.sameValue(
        result.value, undefined, "With right-hand-side: second result `value`");
      assert.sameValue(
        result.done, true, "With right-hand-side: second result `done` flag");
    }).then($DONE, $DONE);
}

// preheat
const NUMBER_OF_PREHEAT = 1;
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}

ArkTools.jitCompileAsync(Test);
assert.sameValue(ArkTools.waitJitCompileFinish(Test), true, '[JIT] JIT disabled.');

// test
const NUMBER_OF_TEST = 1; // or 2
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}
